Web Development Articles - Page 151 of 801

We will learn to extract unique objects by attribute from an array of objects in this tutorial. Sometimes, we need to filter objects from the array of objects based on a particular attribute. For example, we have an id as a key to identify the object. So, we need to ensure that the array contains only a single object with a single id. If two or more objects contain the same primary key value, it can cause the problem of uniquely identifying objects. Here, we will learn different approaches to filter all unique objects from the array based on a ... Read More

In JavaScript, various scopes allow us to access the functions and variables from different places in our code. We will learn about the function scope in this tutorial. Also, we will explore the different types of function expressions in JavaScript. Function Scope When we create a new function in JavaScript, it also creates the scope for that particular function. It means that whatever variables we declare inside the function or define the nested function inside it, we can only access it inside the function block. If we try to access the variables defined inside the function block from outside the ... Read More

This tutorial will teach about the ‘in’ operator in JavaScript. There are many operators available in JavaScript, such as arithmetic operators to perform mathematical operations, assignment operators, equality operators, etc. The ‘in’ operator is also one of them, which we can use to find properties from the object. Before we start, let me ask you a question. Have you ever needed to check for the existence of the object's properties while coding with JavaScript? If yes, how did you deal with it? The answer is simple you can use the ‘in’ operator, which returns the Boolean value based on whether ... Read More

In JavaScript, developers used the prototype to inherit the function with another function in ES5. In the ES6, classes introduced in JavaScript can be used for inheritance as other programming language does. What are sub-classes and inheritance? As the subclass word represents, it is a child class of another class. We can use inheritance to create or derive a subclass from the superclass, and we can call the class to a superclass from which we derive the class and the sub-class to the derived class. The subclass contains all the properties and methods of the superclass, and we can access ... Read More

In this tutorial, let us discuss some fascinating things that a few lines of Javascript can do. Almost every website uses JavaScript. JavaScript was born in 1995, and it is a programming language similar to other languages, but it runs faster because it doesn't have many predefined functions. JavaScript can create programs, libraries, and scripts for websites or desktop applications. A lot of web developers are also good at writing JavaScript. Some JavaScript codes are fascinating if you observe how it behaves. Let us discuss what are these fascinating things in JavaScript. Fascinating things about the semicolon The end of ... Read More

PHP tags with single or double quotes assign a PHP value to a JavaScript variable when setting a PHP variable. Several times you might need to put PHP variable values in JavaScript. You may easily echo on the JS variable with a PHP tag if there are only simple variables, such as a string or any integer. Understanding the sequence of actions when you access a PHP website is necessary before passing a variable from PHP to JavaScript. To create the HTML, the PHP will first run your.php file. Your code will be delivered to the client's browser when PHP ... Read More

Since smartphones are so close to people, mobile app development has begun to influence the world. A combination of languages, primarily JavaScript, CSS, and HTML, is utilized to construct all types of coding. The development of mobile apps is now one of the most crucial areas of current technology developments. The process of creating a mobile app involves a variety of technologies and procedures. Coding, which uses a range of languages to accomplish the process, is one of the most crucial components. JavaScript is a computer language that developers like due to a wide range of advantages. Major developers always ... Read More

JavaScript is a popular programming language that is widely used for building web applications. It is a powerful and flexible language that can be used to create a wide variety of applications, from simple scripts to complex programs. Some common practices for writing JavaScript code − Name things by their name. It is easy because they are short and easy to read. Avoid using global variables. These are general variables in a program. It is tough to understand what is happening in the code. It also leads to problems when the code is changed. Coding style is significant so that ... Read More

Learning a new programming language is an additional advantage to a developer. Before learning JavaScript, developers should get a basic idea of HTML and CSS. You will be wondering why it is essential to learn JavaScript. Other programming languages are also available in Information Technology. Of course, all programming languages are necessary for a developer. But JavaScript is the foundation for all. Knowing HTML, CSS and JavaScript make you an adaptable developer. Popular Both front-end developers and back-end developers use JavaScript. Among 1.8 billion websites in the world, 95% of the websites use JavaScript. Easy JavaScript is easy for those ... Read More

Like Java and JavaScript, these two programming languages will inevitably compete against one another in the future. The name is the first step. As some extension to Java, JavaScript was destined to be forever confused and frequently confused with Java. Given that both Java and JavaScript have the word "Java" in their names, some people think they are connected. Although they have certain similarities, it is untrue since they differ in several ways. Java and JavaScript are used by programmers for various jobs; none is better. While Java is a general-purpose language, JavaScript may be used to create animated and ... Read More